3 years ago

A plane took off at a 15° angle to the ground and flew in Sydney's direction. She is standing at a point 25 miles from the

Mathematics

1 answer:

svlad2 [7]3 years ago

3 0

Answer: The Answer is A: 7.685 but then round it up to 8 on edge

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Is 3, 1, 1/3, 1/9,... a geometric sequence?

barxatty [35]

$a_1;\ a_2;\ a_3;\ a_3;\ ...;\ a_n;\ a_{n+1};...\ is\ a\ geometric\ sequence\\if\ a_{n+1}:a_n=const.\\-------------------\\a_1=3;\ a_2=1;\ a_3=\dfrac{1}{3};\ a_4=\dfrac{1}{9}\\\\a_4:a_3=\dfrac{1}{9}:\dfrac{1}{3}=\dfrac{1}{9}\cdot\dfrac{3}{1}=\dfrac{1}{3}\\\\a_3:a_2=\dfrac{1}{3}:1=\dfrac{1}{3}\\\\a_2:a_1=1:3=\dfrac{1}{3}\\\\Answer:Yes.\ It's\ the\ geometric\ sequence.$